The tissue distribution of human gene pathways. A matrix of 52 tissues and cell lines (columns) versus 290 gene sets and pathways (rows). Each cell in the matrix indicates the Z score, the degree to which the genes in the pathway are over- or under-expressed relative to average (see Materials and methods). Both axes have been clustered with standard two-dimensional hierarchical clustering. A high resolution version of this figure with row labels and a table of expression Z scores of each set in each sample are available as supplemental materials from .
Levine et al. Genome Biology 2006 7:R93 doi:10.1186/gb-2006-7-10-r93